31321780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{1031}}^1$

素因数の和:1085

約数の個数: 72

約数和(自身を含む): 79059456

約数和(自身を除く): 47737676

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 49, 62, 70, 98, 124, 140, 155, 196, 217, 245, 310, 434, 490, 620, 868, 980, 1031, 1085, 1519, 2062, 2170, 3038, 4124, 4340, 5155, 6076, 7217, 7595, 10310, 14434, 15190, 20620, 28868, 30380, 31961, 36085, 50519, 63922, 72170, 101038, 127844, 144340, 159805, 202076, 223727, 252595, 319610, 447454, 505190, 639220, 894908, 1010380, 1118635, 1566089, 2237270, 3132178, 4474540, 6264356, 7830445, 15660890, 31321780]

約数ペア:

[(1, 31321780), (2, 15660890), (4, 7830445), (5, 6264356), (7, 4474540), (10, 3132178), (14, 2237270), (20, 1566089), (28, 1118635), (31, 1010380), (35, 894908), (49, 639220), (62, 505190), (70, 447454), (98, 319610), (124, 252595), (140, 223727), (155, 202076), (196, 159805), (217, 144340), (245, 127844), (310, 101038), (434, 72170), (490, 63922), (620, 50519), (868, 36085), (980, 31961), (1031, 30380), (1085, 28868), (1519, 20620), (2062, 15190), (2170, 14434), (3038, 10310), (4124, 7595), (4340, 7217), (5155, 6076)]